Pinking implement



Jung 2, 1942- ,w. E. BARENTZEN 2,235,249 1 PINKINGiIMPLEMENT Filed May 1, 1941 3n Wklfr E. flarenize/z Patented: June z, 1942 UNITED STATES PATENT QFFICE PINKINGQ IMPLEMENT Walter E. Barentzen, New York, N.v Y. Application May 1, 1941, Serial No. 391,419

6 Claims. I

videa pair of coacting cutting disks which areprovided with crimped or undulating outer portions adapted to be, arranged in partially overlapping,, meshing engagement for producing a shear'typecut-and for causing thecutting disks to revolve simultaneously in opposite directions when either of the cutting disks is driven.

Other objects and advantages of the invention will hereinafter become more fully apparent from the following description of-the drawing, which illustrates a preferred embodiment of the invention, "and wherein:

Figure 1 is a side elevational View of the pink ing implement in its entirety,

Figure 2 is an end view-in elevation of the same looking toward the end of the implement provided with the cutting disks, v a

Figure 3 is an enlarged cross sectional View 33 of Figure 1, I

Figure 4 is an enlarged cross sectionalview taken substantially along the plane of the line 4-4 of Figure 1, and,

Figure 5 is aplan view of a piece of sheet Inataken substantially along the plane ofthe line terial which has beenpartially cut by the implement to illustrate the shape of the cut pro, duced by the implement.

Referring more particularly to the drawing, wherein like reference characters designate like or corresponding parts throughout the different views, II! designates generally the improved pinking tool or implement in its entirety. and which includes a supporting member I I,i which is pref-en ably formed. of a substantially fiat: piece of metal, and which includes an elongated restricted end I2 whichis curved slightly and which is pro vided with an elongated slot to form a finger, hold. The supportingmember II is provided with" an opposite bifurcated end, designated generally I3, having an upper furcation I4 and a lower fur cation I5 which'diverge outwardly,relatively'to one another to form an inwardly converging recess or bight I6 therebetween, as best seen in. Figure 1. The fur-cations I4 and I5, asbest seen in Figure 3,- are providedwith, enlargements I1 on corresponding sides thereof and which are provided with threaded openings I8 which extend therethrough, for a purpose which will hereinafter be described. The supporting member II is provided with'a'portion I9, which is V-shaped in cross section, as best seen in Figure 4, andwhich extends rearwardly from the inner end of the slot or recess I6, and which is disposed sub-;

stantially in axial alinementwith the bifurcated end I3. The portion I9 is formed by pressing the supporting member I I outwardly on one side thereof, Whichside is opposite to the side from whichthe enlargements IT project, and as best seen in Figure 1; the portion I9 tapers toward'its rear end, or the end remote to the recess or bight I6.-

A pair of screws, each designated generally 20,

are each provided with a restricted threaded: shank end 2 ifor engaging a threaded opening I8 to mount one of the screws 20 on the furca- 'tion I4 and the other screw 20 on the furcation- 5. The screws 20 project from the sides of the furcations opposite to the sides thereof provided with the enlargements I'I and are provided with enlarged heads 22 at their opposite ends. The

, screws 20, between their heads 22 and their reinafter become apparent.

striated ends2I are provided with smooth shank portions 23, forming axle The axleportions 23 are adapted to rotatably mount cutting disks 2'4 and 25, which arepreferably of identical construction. Cutting disksand 25 are provided with elongated hubs 26,

which are of substantially the same length as the axle portions 23, which they are adapted to rotatably engage. The disks 24 and 25 include inner, substantially flat annular portions 21 which abut against the inner sides of the heads 22. Beyond the portions 27, the cutting disks have intermediate conicalportions 28 which extend obliquely in a directiontoward the sup port II. Beyond the portions 23, the disk 2 4 and 25 are provided with marginal portions 29 which are disposed, substantially parallel to the portions 21, and which are crimped, as best seen in Figures 2 and 3, toform the undulating edges 30, which are sharpened to form cutting edges. The diameters of the disks 24 and 25 are slightly greater than the distance between the screws 2!! so that the crimped portions 29 slightly overlap and are arranged to intermeshras seen in Figure with the portion'ZS of the lower cuttingdisk 25, which is attached to the lower'furcation I5, disposed'onthe inner side of the disk 24. As seen in Figure 3; an expansion coil'sprin'g' I is disposed around the 'hub'zt of the lower'disk' wardly of the support portions, as will herea-Xes of the the lower disk; 25 outyond the portion 29 of the lower disk 25, and which is curved longitudinally to form a guard to prevent the edge 30 of the disk 25 from coming in contact with a surface, as seen at 32', over which the implement I is being moved, as will hereinafter become apparent.

A gear 33 is turnably mounted on the hub 26 of the cutting disk 24 and, as best seen in Figure 1, the gear 33 is provided with teeth 34 which ex tend partially therearound. The gear 33 is provided with an internal recess 35 in which is disposed a coil spring 36, which is coiled in a counterclockwise direction therearound from its inner end. which is disposed adjacent the furcation 14, to its outer end 31.

wardly through an opening 38 in the gear 33. Opening 33 opens into an end groove, formed by the teeth at one end of the toothed portion 3 and the end 31 is bent to engage in said groove.

VA lever 39 is provided with an arcuately shaped gear segment or rack portion 49, at one end thereof and is pivotally mounted, adjacent its end 40 on the support II by means of a screw 4|, the threaded shank of which engages an opening 42 in an enlargement 43, which is disposed on the same side of the support H as the enlargements 11, so that the lever 39 is mounted on the oppositeside of the support H, or on the same side thereof as the cutting disks 24 and 25. The screw 4| is preferably of the same construction as the screws and is arranged to position the lever 39 so that its rack portion 40 will mesh with the teeth 34. The opposite end of the lever 39 projects upwardly and rearwardly, relatively to the support II, and is provided with an opening forming a thumbhold 44 which is disposed above the fingerhold 12, as best seen in Figure 1. The pinking tool or implement I0 is adapted for use in cutting sheet material, such as cloth, as seen at 45,'in Figure 5. The tool I9 is held, in the position as illustrated in Figure l, with the fingers of the operator inserted through the slot of the fingerhold l2 and the thumb of the same hand inserted through the slot of the thumbhold 44 so that the tool [0 can be operated in the same manner as a pair of shears or scissors. The guard flange 32 is adapted to rest on a suitable supporting indicated by the line 32. The sheet 45 is introduced to the tool I!) between the cutting edges 33 of the disks 24 and 25. By moving the end 44 of the lever 39 toward the portion 12 th gear segment end 40 will be swung upwardly to revolve the gear 33 in a counterclockwise direction, as seen in Figure 1. This will cause the spring 35 to be wound or tightened to thereby frictionally engage the hub 26 of the disk 24 so that the disk 24 will be rotated in a counterclockwise direction. The meshing engagement of the crimped portions 29 will cause the lower disk to be simultaneously revolved in an opposite or clock-4 wise direction thereby causing the cutting edges to execute a shearing cut in the material 45, as the tool or implement I9 is advanced relatively thereto. When the end 44 of the lever 39 I is swung away from the portion l2 the spring 33 will be unwound and released from the hub 26 of the disk 24 to prevent the disks from revolving in opposite directions, to the directions just previously described and to thereby return the lever 39 to a position where it can be again operated for revolving the disks 24 and'25 to execute an- The end 31 projects out surface, as for example a table, as

other cutting stroke. It is to be understood that the implement I0 is advanced relatively to the sheet material and produces an undulating cut in the material, as indicated at 4B, in Figure 5. The apex of the V-shaped portion I9 is disposed substantially behind the cutting edges 30,

as seen in Figures 2 and 3, for dividing the porrack portion 40 to move out of engagement with the teeth 34. As previously pointed out the spring 3| will hold the portion 29 of the disk 25 in tight engagement with the portion 29 of the disk 24 so that the cutting edges 30 will properly cooperate to produce a shearing cut.

Various modifications and changes are contemplated and may obviously be resorted to as only a preferred embodiment of the invention has been disclosed.

I claim as my invention:

1. A pinking implement comprising a frame member having a fingerhold at one end thereof and a bifurcated opposite end, cutting disks rotatably connected to the furcations of said bifurcated end, said cutting disks having crimped marginal portions, said crimped portions being enmeshed, a lever pivotally mounted on the frame member and having a fingerhold at one end thereof in complementary relationship to the fingerhold of the frame member and ratchet means for connecting the opposite end of said lever to one of said cutting disks for rotating said cutting disk to cause the cutting disks to be rotated simultaneously in opposite directions.

2. An implement as in claim 1, said disks being disposed on one side of the frame, said frame comprising a substantially fiat plate provided with a laterally pressed longitudinally extending portion, forming a continuation of the bight of the bifurcated portion and adapted to divide the cut portions of a piece of material after it has passed through and been cut by said disks, the forward end of the laterally pressed portion being disposed substantially in I alinement with the planes of the disks.

3. A pinking implement comprising a pair of rotatably mounted disks having sharpened peripheries, said disks being provided with undulating outer portions, said undulating portions being enmeshed and partially overlapping, and means for revolving one of said disks to cause the two disks to revolve in opposite directions.

4. A pinking implement comprising a support member, a pair of cutting disks rotatably mounted thereon, and said cutting disks having intermeshed, undulating sharpened edges.

5. A pinking implement as in claim 4, comprising hand operated means for revolving one of said disks to cause said disks to turn simultaneously and at uniform speeds in opposite directions.

6. A pinking implement as in claim 4, comprising spring means for urging one of said cutting disks laterally of the supporting frame for yieldably retaining the cutting disks in tight coacting engagement.

WALTER E. BARENTZEN. 

